// xImaSel.cpp : Selection functions
/* 07/08/2001 v1.00 - Davide Pizzolato - www.xdp.it
 * CxImage version 7.0.1 07/Jan/2011
 */

#include "ximage.h"

////////////////////////////////////////////////////////////////////////////////
/**
 * Checks if the image has a valid selection.
 */
bool CxImage::SelectionIsValid()
{
    return pSelection!=0;
}

#if CXIMAGE_SUPPORT_SELECTION

////////////////////////////////////////////////////////////////////////////////
/**
 * Gets the smallest rectangle that contains the selection 
 */
void CxImage::SelectionGetBox(RECT& r)
{
    memcpy(&r,&info.rSelectionBox,sizeof(RECT));
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Empties the selection.
 */
bool CxImage::SelectionClear(uint8_t level)
{
    if (pSelection){
        if (level==0){
            memset(pSelection,0,head.biWidth * head.biHeight);
            info.rSelectionBox.left = head.biWidth;
            info.rSelectionBox.bottom = head.biHeight;
            info.rSelectionBox.right = info.rSelectionBox.top = 0;
        } else {
            memset(pSelection,level,head.biWidth * head.biHeight);
            info.rSelectionBox.right = head.biWidth;
            info.rSelectionBox.top = head.biHeight;
            info.rSelectionBox.left = info.rSelectionBox.bottom = 0;
        }
        return true;
    }
    return false;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Allocates an empty selection.
 */
bool CxImage::SelectionCreate()
{
    SelectionDelete();
    pSelection = (uint8_t*)calloc(head.biWidth * head.biHeight, 1);
    return (pSelection!=0);
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Deallocates the selction.
 */
bool CxImage::SelectionDelete()
{
    if (pSelection){
        free(pSelection);
        pSelection=nullptr;
    }
    info.rSelectionBox.left = head.biWidth;
    info.rSelectionBox.bottom = head.biHeight;
    info.rSelectionBox.right = info.rSelectionBox.top = 0;
    return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Checks if the coordinates are inside the selection.
 */
bool CxImage::SelectionIsInside(int32_t x, int32_t y)
{
    if (IsInside(x,y)){
        if (pSelection==nullptr) return true;
        return pSelection[x+y*head.biWidth]!=0;
    }
    return false;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Checks if the coordinates are inside the selection.
 * "blind" version assumes that (x,y) is inside to the image.
 */
bool CxImage::BlindSelectionIsInside(int32_t x, int32_t y)
{
#ifdef _DEBUG
    if (!IsInside(x,y))
  #if CXIMAGE_SUPPORT_EXCEPTION_HANDLING
        throw 0;
  #else
        return 0;
  #endif
#endif
    if (pSelection==nullptr) return true;
    return pSelection[x+y*head.biWidth]!=0;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Adds a rectangle to the existing selection.
 */
bool CxImage::SelectionAddRect(RECT r, uint8_t level)
{
    if (pSelection==nullptr) SelectionCreate();
    if (pSelection==nullptr) return false;

    RECT r2;
    if (r.left<r.right) {r2.left=r.left; r2.right=r.right; } else {r2.left=r.right ; r2.right=r.left; }
    if (r.bottom<r.top) {r2.bottom=r.bottom; r2.top=r.top; } else {r2.bottom=r.top ; r2.top=r.bottom; }

    if (info.rSelectionBox.top <= r2.top) info.rSelectionBox.top = max(0L,min(head.biHeight,r2.top+1));
    if (info.rSelectionBox.left > r2.left) info.rSelectionBox.left = max(0L,min(head.biWidth,r2.left));
    if (info.rSelectionBox.right <= r2.right) info.rSelectionBox.right = max(0L,min(head.biWidth,r2.right+1));
    if (info.rSelectionBox.bottom > r2.bottom) info.rSelectionBox.bottom = max(0L,min(head.biHeight,r2.bottom));

    int32_t ymin = max(0L,min(head.biHeight,r2.bottom));
    int32_t ymax = max(0L,min(head.biHeight,r2.top+1));
    int32_t xmin = max(0L,min(head.biWidth,r2.left));
    int32_t xmax = max(0L,min(head.biWidth,r2.right+1));

    for (int32_t y=ymin; y<ymax; y++)
        memset(pSelection + xmin + y * head.biWidth, level, xmax-xmin);

    return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Adds an ellipse to the existing selection.
 */
bool CxImage::SelectionAddEllipse(RECT r, uint8_t level)
{
    if (pSelection==nullptr) SelectionCreate();
    if (pSelection==nullptr) return false;

    int32_t xradius = abs(r.right - r.left)/2;
    int32_t yradius = abs(r.top - r.bottom)/2;
    if (xradius==0 || yradius==0) return false;

    int32_t xcenter = (r.right + r.left)/2;
    int32_t ycenter = (r.top + r.bottom)/2;

    if (info.rSelectionBox.left > (xcenter - xradius)) info.rSelectionBox.left = max(0L,min(head.biWidth,(xcenter - xradius)));
    if (info.rSelectionBox.right <= (xcenter + xradius)) info.rSelectionBox.right = max(0L,min(head.biWidth,(xcenter + xradius + 1)));
    if (info.rSelectionBox.bottom > (ycenter - yradius)) info.rSelectionBox.bottom = max(0L,min(head.biHeight,(ycenter - yradius)));
    if (info.rSelectionBox.top <= (ycenter + yradius)) info.rSelectionBox.top = max(0L,min(head.biHeight,(ycenter + yradius + 1)));

    int32_t xmin = max(0L,min(head.biWidth,xcenter - xradius));
    int32_t xmax = max(0L,min(head.biWidth,xcenter + xradius + 1));
    int32_t ymin = max(0L,min(head.biHeight,ycenter - yradius));
    int32_t ymax = max(0L,min(head.biHeight,ycenter + yradius + 1));

    int32_t y,yo;
    for (y=ymin; y<min(ycenter,ymax); y++){
        for (int32_t x=xmin; x<xmax; x++){
            yo = (int32_t)(ycenter - yradius * sqrt(1-pow((float)(x - xcenter)/(float)xradius,2)));
            if (yo<y) pSelection[x + y * head.biWidth] = level;
        }
    }
    for (y=ycenter; y<ymax; y++){
        for (int32_t x=xmin; x<xmax; x++){
            yo = (int32_t)(ycenter + yradius * sqrt(1-pow((float)(x - xcenter)/(float)xradius,2)));
            if (yo>y) pSelection[x + y * head.biWidth] = level;
        }
    }
    return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Inverts the selection.
 * Note: the SelectionBox is set to "full image", call SelectionGetBox before (if necessary)
 */
bool CxImage::SelectionInvert()
{
    if (pSelection) {
        uint8_t *iSrc=pSelection;
        int32_t n=head.biHeight*head.biWidth;
        for(int32_t i=0; i < n; i++){
            *iSrc=(uint8_t)~(*(iSrc));
            iSrc++;
        }

        SelectionRebuildBox();

        return true;
    }
    return false;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Imports an existing region from another image with the same width and height.
 */
bool CxImage::SelectionCopy(CxImage &from)
{
    if (from.pSelection == nullptr || head.biWidth != from.head.biWidth || head.biHeight != from.head.biHeight) return false;
    if (pSelection==nullptr) pSelection = (uint8_t*)malloc(head.biWidth * head.biHeight);
    if (pSelection==nullptr) return false;
    memcpy(pSelection,from.pSelection,head.biWidth * head.biHeight);
    memcpy(&info.rSelectionBox,&from.info.rSelectionBox,sizeof(RECT));
    return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Adds a polygonal region to the existing selection. points points to an array of POINT structures.
 * Each structure specifies the x-coordinate and y-coordinate of one vertex of the polygon.
 * npoints specifies the number of POINT structures in the array pointed to by points.
 */
bool CxImage::SelectionAddPolygon(POINT *points, int32_t npoints, uint8_t level)
{
    if (points==nullptr || npoints<3) return false;

    if (pSelection==nullptr) SelectionCreate();
    if (pSelection==nullptr) return false;

    uint8_t* plocal = (uint8_t*)calloc(head.biWidth*head.biHeight, 1);
    RECT localbox = {head.biWidth,0,0,head.biHeight};

    int32_t x,y,i=0;
    POINT *current;
    POINT *next = nullptr;
    POINT *start = nullptr;
    //trace contour
    while (i < npoints){
        current = &points[i];
        if (current->x!=-1){
            if (i==0 || (i>0 && points[i-1].x==-1)) start = &points[i];

            if ((i+1)==npoints || points[i+1].x==-1)
                next = start;
            else
                next = &points[i+1];

            float beta;
            if (current->x != next->x){
                beta = (float)(next->y - current->y)/(float)(next->x - current->x);
                if (current->x < next->x){
                    for (x=current->x; x<=next->x; x++){
                        y = (int32_t)(current->y + (x - current->x) * beta);
                        if (IsInside(x,y)) plocal[x + y * head.biWidth] = 255;
                    }
                } else {
                    for (x=current->x; x>=next->x; x--){
                        y = (int32_t)(current->y + (x - current->x) * beta);
                        if (IsInside(x,y)) plocal[x + y * head.biWidth] = 255;
                    }
                }
            }
            if (current->y != next->y){
                beta = (float)(next->x - current->x)/(float)(next->y - current->y);
                if (current->y < next->y){
                    for (y=current->y; y<=next->y; y++){
                        x = (int32_t)(current->x + (y - current->y) * beta);
                        if (IsInside(x,y)) plocal[x + y * head.biWidth] = 255;
                    }
                } else {
                    for (y=current->y; y>=next->y; y--){
                        x = (int32_t)(current->x + (y - current->y) * beta);
                        if (IsInside(x,y)) plocal[x + y * head.biWidth] = 255;
                    }
                }
            }
        }

        RECT r2;
        if (current->x < next->x) {r2.left=current->x; r2.right=next->x; } else {r2.left=next->x ; r2.right=current->x; }
        if (current->y < next->y) {r2.bottom=current->y; r2.top=next->y; } else {r2.bottom=next->y ; r2.top=current->y; }
        if (localbox.top < r2.top) localbox.top = max(0L,min(head.biHeight-1,r2.top+1));
        if (localbox.left > r2.left) localbox.left = max(0L,min(head.biWidth-1,r2.left-1));
        if (localbox.right < r2.right) localbox.right = max(0L,min(head.biWidth-1,r2.right+1));
        if (localbox.bottom > r2.bottom) localbox.bottom = max(0L,min(head.biHeight-1,r2.bottom-1));

        i++;
    }

    //fill the outer region
    int32_t npix=(localbox.right - localbox.left)*(localbox.top - localbox.bottom);
    POINT* pix = (POINT*)calloc(npix,sizeof(POINT));
    uint8_t back=0, mark=1;
    int32_t fx, fy, fxx, fyy, first, last;
    int32_t xmin = 0;
    int32_t xmax = 0;
    int32_t ymin = 0;
    int32_t ymax = 0;

    for (int32_t side=0; side<4; side++){
        switch(side){
        case 0:
            xmin=localbox.left; xmax=localbox.right+1; ymin=localbox.bottom; ymax=localbox.bottom+1;
            break;
        case 1:
            xmin=localbox.right; xmax=localbox.right+1; ymin=localbox.bottom; ymax=localbox.top+1;
            break;
        case 2:
            xmin=localbox.left; xmax=localbox.right+1; ymin=localbox.top; ymax=localbox.top+1;
            break;
        case 3:
            xmin=localbox.left; xmax=localbox.left+1; ymin=localbox.bottom; ymax=localbox.top+1;
            break;
        }
        //fill from the border points
        for(y=ymin;y<ymax;y++){
            for(x=xmin;x<xmax;x++){
                if (plocal[x+y*head.biWidth]==0){
                    // Subject: FLOOD FILL ROUTINE              Date: 12-23-97 (00:57)       
                    // Author:  Petter Holmberg                 Code: QB, QBasic, PDS        
                    // Origin:  petter.holmberg@usa.net         Packet: GRAPHICS.ABC
                    first=0;
                    last=1;
                    while(first!=last){
                        fx = pix[first].x;
                        fy = pix[first].y;
                        fxx = fx + x;
                        fyy = fy + y;
                        for(;;)
                        {
                            if ((plocal[fxx + fyy*head.biWidth] == back) &&
                                fxx>=localbox.left && fxx<=localbox.right && fyy>=localbox.bottom && fyy<=localbox.top )
                            {
                                plocal[fxx + fyy*head.biWidth] = mark;
                                if (fyy > 0 && plocal[fxx + (fyy - 1)*head.biWidth] == back){
                                    pix[last].x = fx;
                                    pix[last].y = fy - 1;
                                    last++;
                                    if (last == npix) last = 0;
                                }
                                if ((fyy + 1)<head.biHeight && plocal[fxx + (fyy + 1)*head.biWidth] == back){
                                    pix[last].x = fx;
                                    pix[last].y = fy + 1;
                                    last++;
                                    if (last == npix) last = 0;
                                }
                            } else {
                                break;
                            }
                            fx++;
                            fxx++;
                        };

                        fx = pix[first].x - 1;
                        fy = pix[first].y;
                        fxx = fx + x;
                        fyy = fy + y;

                        for( ;; )
                        {
                            if ((plocal[fxx + fyy*head.biWidth] == back) &&
                                fxx>=localbox.left && fxx<=localbox.right && fyy>=localbox.bottom && fyy<=localbox.top )
                            {
                                plocal[fxx + (y + fy)*head.biWidth] = mark;
                                if (fyy > 0 && plocal[fxx + (fyy - 1)*head.biWidth] == back){
                                    pix[last].x = fx;
                                    pix[last].y = fy - 1;
                                    last++;
                                    if (last == npix) last = 0;
                                }
                                if ((fyy + 1)<head.biHeight && plocal[fxx + (fyy + 1)*head.biWidth] == back){
                                    pix[last].x = fx;
                                    pix[last].y = fy + 1;
                                    last++;
                                    if (last == npix) last = 0;
                                }
                            } else {
                                break;
                            }
                            fx--;
                            fxx--;
                        }
                        
                        first++;
                        if (first == npix) first = 0;
                    }
                }
            }
        }
    }

    //transfer the region
    int32_t yoffset;
    for (y=localbox.bottom; y<=localbox.top; y++){
        yoffset = y * head.biWidth;
        for (x=localbox.left; x<=localbox.right; x++)
            if (plocal[x + yoffset]!=1) pSelection[x + yoffset]=level;
    }
    if (info.rSelectionBox.top <= localbox.top) info.rSelectionBox.top = min(head.biHeight,localbox.top + 1);
    if (info.rSelectionBox.left > localbox.left) info.rSelectionBox.left = min(head.biWidth,localbox.left);
    if (info.rSelectionBox.right <= localbox.right) info.rSelectionBox.right = min(head.biWidth,localbox.right + 1);
    if (info.rSelectionBox.bottom > localbox.bottom) info.rSelectionBox.bottom = min(head.biHeight,localbox.bottom);

    free(plocal);
    free(pix);

    return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Adds to the selection all the pixels matching the specified color.
 */
bool CxImage::SelectionAddColor(RGBQUAD c, uint8_t level)
{
    if (pSelection==nullptr) SelectionCreate();
    if (pSelection==nullptr) return false;

    RECT localbox = {head.biWidth,0,0,head.biHeight};

    for (int32_t y = 0; y < head.biHeight; y++){
        for (int32_t x = 0; x < head.biWidth; x++){
            RGBQUAD color = BlindGetPixelColor(x, y);
            if (color.rgbRed   == c.rgbRed &&
                color.rgbGreen == c.rgbGreen &&
                color.rgbBlue  == c.rgbBlue)
            {
                pSelection[x + y * head.biWidth] = level;

                if (localbox.top < y) localbox.top = y;
                if (localbox.left > x) localbox.left = x;
                if (localbox.right < x) localbox.right = x;
                if (localbox.bottom > y) localbox.bottom = y;
            }
        }
    }

    if (info.rSelectionBox.top <= localbox.top) info.rSelectionBox.top = localbox.top + 1;
    if (info.rSelectionBox.left > localbox.left) info.rSelectionBox.left = localbox.left;
    if (info.rSelectionBox.right <= localbox.right) info.rSelectionBox.right = localbox.right + 1;
    if (info.rSelectionBox.bottom > localbox.bottom) info.rSelectionBox.bottom = localbox.bottom;

    return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Adds a single pixel to the existing selection.
 */
bool CxImage::SelectionAddPixel(int32_t x, int32_t y, uint8_t level)
{
    if (pSelection==nullptr) SelectionCreate();
    if (pSelection==nullptr) return false;

    if (IsInside(x,y)) {
        pSelection[x + y * head.biWidth] = level; // set the correct mask bit

        if (info.rSelectionBox.top <= y) info.rSelectionBox.top = y+1;
        if (info.rSelectionBox.left > x) info.rSelectionBox.left = x;
        if (info.rSelectionBox.right <= x) info.rSelectionBox.right = x+1;
        if (info.rSelectionBox.bottom > y) info.rSelectionBox.bottom = y;

        return true;
    }

    return false;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Exports the selection channel in a 8bpp grayscale image.
 */
bool CxImage::SelectionSplit(CxImage *dest)
{
    if (!pSelection || !dest) return false;

    CxImage tmp(head.biWidth,head.biHeight,8);
    if (!tmp.IsValid()){
        strcpy_s(info.szLastError,tmp.GetLastError());
        return false;
    }

    for(int32_t y=0; y<head.biHeight; y++){
        for(int32_t x=0; x<head.biWidth; x++){
            tmp.BlindSetPixelIndex(x,y,pSelection[x+y*head.biWidth]);
        }
    }

    tmp.SetGrayPalette();
    dest->Transfer(tmp);

    return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Creates the selection channel from a gray scale image.
 * black = unselected
 */
bool CxImage::SelectionSet(CxImage &from)
{
    if (!from.IsGrayScale() || head.biWidth != from.head.biWidth || head.biHeight != from.head.biHeight){
        strcpy_s(info.szLastError,"CxImage::SelectionSet: wrong width or height, or image is not gray scale");
        return false;
    }

    if (pSelection==nullptr) pSelection = (uint8_t*)malloc(head.biWidth * head.biHeight);

    uint8_t* src = from.info.pImage;
    uint8_t* dst = pSelection;
    if (src==nullptr || dst==nullptr){
        strcpy_s(info.szLastError,"CxImage::SelectionSet: null pointer");
        return false;
    }

    for (int32_t y=0; y<head.biHeight; y++){
        memcpy(dst,src,head.biWidth);
        dst += head.biWidth;
        src += from.info.dwEffWidth;
    }

    SelectionRebuildBox();

    return true;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Sets the Selection level for a single pixel
 * internal use only: doesn't set SelectionBox. Use SelectionAddPixel
 */
void CxImage::SelectionSet(const int32_t x,const int32_t y,const uint8_t level)
{
    if (pSelection && IsInside(x,y)) pSelection[x+y*head.biWidth]=level;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Gets the Selection level for a single pixel 
 */
uint8_t CxImage::SelectionGet(const int32_t x,const int32_t y)
{
    if (pSelection && IsInside(x,y)) return pSelection[x+y*head.biWidth];
    return 0;
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Rebuilds the SelectionBox 
 */
void CxImage::SelectionRebuildBox()
{
    info.rSelectionBox.left = head.biWidth;
    info.rSelectionBox.bottom = head.biHeight;
    info.rSelectionBox.right = info.rSelectionBox.top = 0;

    if (!pSelection)
        return;

    int32_t x,y;

    for (y=0; y<head.biHeight; y++){
        for (x=0; x<info.rSelectionBox.left; x++){
            if (pSelection[x+y*head.biWidth]){
                info.rSelectionBox.left = x;
                continue;
            }
        }
    }

    for (y=0; y<head.biHeight; y++){
        for (x=head.biWidth-1; x>=info.rSelectionBox.right; x--){
            if (pSelection[x+y*head.biWidth]){
                info.rSelectionBox.right = x+1;
                continue;
            }
        }
    }

    for (x=0; x<head.biWidth; x++){
        for (y=0; y<info.rSelectionBox.bottom; y++){
            if (pSelection[x+y*head.biWidth]){
                info.rSelectionBox.bottom = y;
                continue;
            }
        }
    }

    for (x=0; x<head.biWidth; x++){
        for (y=head.biHeight-1; y>=info.rSelectionBox.top; y--){
            if (pSelection[x+y*head.biWidth]){
                info.rSelectionBox.top = y+1;
                continue;
            }
        }
    }

}
////////////////////////////////////////////////////////////////////////////////
/**
 * Gets the Selection level for a single pixel 
 * "blind" version assumes that (x,y) is inside to the image.
 */
uint8_t CxImage::BlindSelectionGet(const int32_t x,const int32_t y)
{
#ifdef _DEBUG
    if (!IsInside(x,y) || (pSelection==0))
  #if CXIMAGE_SUPPORT_EXCEPTION_HANDLING
        throw 0;
  #else
        return 0;
  #endif
#endif
    return pSelection[x+y*head.biWidth];
}
////////////////////////////////////////////////////////////////////////////////
/**
 * Returns pointer to selection data for pixel (x,y).
 */
uint8_t* CxImage::SelectionGetPointer(const int32_t x,const int32_t y)
{
    if (pSelection && IsInside(x,y)) return pSelection+x+y*head.biWidth;
    return 0;
}
////////////////////////////////////////////////////////////////////////////////
bool CxImage::SelectionFlip()
{
    if (!pSelection) return false;

    uint8_t *buff = (uint8_t*)malloc(head.biWidth);
    if (!buff) return false;

    uint8_t *iSrc,*iDst;
    iSrc = pSelection + (head.biHeight-1)*head.biWidth;
    iDst = pSelection;
    for (int32_t i=0; i<(head.biHeight/2); ++i)
    {
        memcpy(buff, iSrc, head.biWidth);
        memcpy(iSrc, iDst, head.biWidth);
        memcpy(iDst, buff, head.biWidth);
        iSrc-=head.biWidth;
        iDst+=head.biWidth;
    }

    free(buff);

    int32_t top = info.rSelectionBox.top;
    info.rSelectionBox.top = head.biHeight - info.rSelectionBox.bottom;
    info.rSelectionBox.bottom = head.biHeight - top;
    return true;
}
////////////////////////////////////////////////////////////////////////////////
bool CxImage::SelectionMirror()
{
    if (!pSelection) return false;
    uint8_t* pSelection2 = (uint8_t*)malloc(head.biWidth * head.biHeight);
    if (!pSelection2) return false;
    
    uint8_t *iSrc,*iDst;
    int32_t wdt=head.biWidth-1;
    iSrc=pSelection + wdt;
    iDst=pSelection2;
    for(int32_t y=0; y < head.biHeight; y++){
        for(int32_t x=0; x <= wdt; x++)
            *(iDst+x)=*(iSrc-x);
        iSrc+=head.biWidth;
        iDst+=head.biWidth;
    }
    free(pSelection);
    pSelection=pSelection2;
    
    int32_t left = info.rSelectionBox.left;
    info.rSelectionBox.left = head.biWidth - info.rSelectionBox.right;
    info.rSelectionBox.right = head.biWidth - left;
    return true;
}
////////////////////////////////////////////////////////////////////////////////
#if CXIMAGE_SUPPORT_WINDOWS
/**
 * Converts the selection in a HRGN object.
 */
bool CxImage::SelectionToHRGN(HRGN& region)
{
    if (pSelection && region){           
        for(int32_t y = 0; y < head.biHeight; y++){
            HRGN hTemp = nullptr;
            int32_t iStart = -1;
            int32_t x = 0;
            for(; x < head.biWidth; x++){
                if (pSelection[x + y * head.biWidth] != 0){
                    if (iStart == -1) iStart = x;
                    continue;
                }else{
                    if (iStart >= 0){
                        hTemp = CreateRectRgn(iStart, y, x, y + 1);
                        CombineRgn(region, hTemp, region, RGN_OR);
                        DeleteObject(hTemp);
                        iStart = -1;
                    }
                }
            }
            if (iStart >= 0){
                hTemp = CreateRectRgn(iStart, y, x, y + 1);
                CombineRgn(region, hTemp, region, RGN_OR);
                DeleteObject(hTemp);
                iStart = -1;
            }
        }
        return true;
    }
    return false;
}
#endif //CXIMAGE_SUPPORT_WINDOWS
////////////////////////////////////////////////////////////////////////////////
#endif //CXIMAGE_SUPPORT_SELECTION
